Summarized Balance Sheet Information of Reportable Segments (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Current assets:
Cash and cash equivalents	$ 44.9	$ 62.0	$ 44.6
Trade accounts receivable, net	101.6
Financing receivable	47.6
Inventories	118.1
Other current assets	14.4	1.0
Total current assets	326.8	86.1
Property, plant and equipment, net	320.1	0.1
Other noncurrent assets	8.0	1.1
TOTAL ASSETS	763.2	121.9
Current liabilities:
Trade payables	120.6
Accrued liabilities	39.0	7.1
Total current liabilities	162.4	15.2
Accrued pension benefits	46.3
Environmental liabilities	18.4
Other noncurrent liabilities	8.6	0.3
TOTAL LIABILITIES	597.2	$ 36.3
RANA
Current assets:
Cash and cash equivalents	5.2
Trade accounts receivable, net	86.4
Inventories	72.9
Other current assets	5.1
Total current assets	169.6
Property, plant and equipment, net	215.4
Other noncurrent assets	4.8
TOTAL ASSETS	389.8
Current liabilities:
Trade payables	65.0
Accrued liabilities	22.3
Total current liabilities	87.3
Environmental liabilities	18.4
Other noncurrent liabilities	6.9
TOTAL LIABILITIES	112.6
RAEU
Current assets:
Cash and cash equivalents	16.4
Trade accounts receivable, net	15.2
Financing receivable	47.6
Inventories	45.2
Other current assets	2.8
Total current assets	127.2
Property, plant and equipment, net	104.6
Other noncurrent assets	2.0
TOTAL ASSETS	233.8
Current liabilities:
Trade payables	55.3
Accrued liabilities	13.1
Total current liabilities	68.4
Accrued pension benefits	46.3
Other noncurrent liabilities	1.7
TOTAL LIABILITIES	$ 116.4